Chevrolet sonic Tires

These came as standard on both mine and my wife's cars: a 2013 Chevy Sonic and a 2013 Chevy Trax - both H rated. First off and most importantly, these tires didn't last as long as I'd hoped for Conti's - we got about 15k out of them before they were near enough bald on the Trax and 18K out of the ones on the Sonic. I've had budget Three-A P606's that have lasted 30K+ which was a real shame for the PremiumContacts. Secondly, there's one bit of corkscrew bend in my town that the tires frequently lost grip on in both cars in the dry - nothing major but you would feel the back-end step out at 20+, this hasn't happened on any other tires and remember both cars are FWD. Hitting this bend in the wet would cause the back end to slip out at anything above 15mph.
Thirdly, while noise was OK at first, it gets considerably worse the more wear you're dealing with, so much so in the Sonic that you would get out of the car after long journeys with ringing in your ears and a headache.
They feel pretty firm too and aren't great at absorbing bumps as much as other tires we've had, so they were uncomfortable at every stage of their lives. We were, at one point, thinking that the cars were the problem; Then we swapped the tires out (Sailun Atrezzo Elites on the Trax and Toyo Proxes CF2's on the Sonic) and they're both completely different cars, so much more comfortable to drive, much more reliable grip and so much quieter.

I'm surprised we had such bad experiences with this tire, because Continental are usually a great brand - but think they're just not well suited to our cars.

I bought my car (Chevrolet Sonic 1600 automatic) fitted with these tires and only have to replace the one set now after 56 000 miles (90 000km). This is exceptional for any tire I have ever had on any of my cars. I am very impressed by the even wear on the tires. The only concern is the flaking of the tire which could be due to the previous driver's style of driving? Overall, very happy with the performance.